<!doctype html>
<meta charset="utf-8">
<link rel="author" title="Peng Zhou" href="mailto:zhoupeng.1996@bytedance.com">
<link rel="help" href="https://github.com/w3c/selection-api/issues/173">
<link rel="help" href="https://issues.chromium.org/issues/326554272">
<title>Selection.modify(): move by paragraph cross editing boundary</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div contenteditable style="width: 140px; font-size: 14px;">
  <p>P1</p>
  <p>
    Line 1: Hello World
    Line 2: <span contenteditable="false">Hello</span> <span id="end">World</span>
  </p>
</div>
<script>
const selection = getSelection();
const end = document.querySelector('#end');
function runTest() {
  selection.collapse(end.childNodes[0], 5);
  selection.modify('move', 'backward', 'paragraph');
  assert_equals(selection.anchorNode.nodeValue, 'P1');
  assert_equals(selection.anchorOffset, 2);
}

test(() => {
  runTest();
}, 'cross editing boundary');

test(() => {
  const editable = document.querySelector('span[contenteditable=false]');
  editable.setAttribute('contenteditable', true);
  runTest();
}, 'not cross editing boundary');
</script>